Electric motor.



S. C. BRYANT.

ELECTRIC MOTOR.

APPLICATION FILED DEC. 1. 19M

Patnted A11 17, 1915.

WITNESSES PA rams- SilllANLEY CHAR LES BRYANT, F CHICAGO, ILLINOIS, ASSIGNOR TO BRYANT ZlNC COMPANY, OF CHICAGO, ILLINOIS, A CORPGRATION OF ILLINOIS.

ELECTRIC 'MOTQR To all whom it may concern Be it known that I, STANLEY CHARLES BRYANT, a citizen of the United States, and a resident of the city of Chicago, in the coimty of Cook and State of Illinois, have invented a new and useful Electric Motor,

of which the following is a specification.

This invention relates to an electric motor, and more particularly to an electric motor especially applicable for-operating a pendulum like body, such as a railway crossing signal of the swinging arm type.

The primary object of this invention is such a design of electric motor as will operate a pendulum like body, such as a highway crossing signal of the swinging arm type without causing the excessive shocks and jars now incident to the types of motors used for such purpose.

A further object of the invention is the production of simple and ellicient means for quickly bringing a swinging body to rest.

Other objects and advantages will appear as the description of the vention progrosses, and the novel features of the in 'vention will be particularly pointed out in the appended claims. In. describing the intention in detail, reference is had to the accompanying drawing,

wherein I have illustrated a preferred physical embodiment of my invention and wherein like characters of reference designate corresponding parts throughout the several views, and in which:

Figure 1 is a part front elevation and part sectional elevation of my invention asapplied to a railway crossing signal of the swinging arm type; Fig. 2, is a schematic representation of one system of circuits which may be used for controlling the electric motor shown in Fig. 1.

A highway crossing signal is shown in Fig. 1, designated 1, which is attached to a rod '2, pivoted at 3, so that it can swing similarly to a pendulum. The rod 2 is continued above the pivot 3' and is connected to a link 4 which at its other end is connected to one arm 5 of aT crank, the other two arms of which are designatedl} and 7 and which is pivoted on the pin 8. The arms 6 and of the T crank are connected by means of the rods 9 and 10, respectively, with stirrups l1 and 12, respectively. The stirrups 11 and. 12 are'rigidly fastened to cores 13' and- Specification of Letters Patent.

Patented Aug. 17, 1915.

Application filed December 1, .1924. Serial No. 875,014.

14, respectively, which serve as the cores of solenoids 15 and 16, respectively.

A casing 17 shown partly in section, supports the solenoids 15 and 16; the pivot pin 8:, the pin 3, and also a circuit controller. The circuit controller comprises metallic sg'iring arms 18 and 19, together with the metallic arm 20, whicl'rispivoted at 21, and which may be moved on its pivot so as to contact with either the spring arm 18 or the spring arm 19, and is c *lind'rical on its contact end so that when placed in contact with either of the spring arms it will remain in contact therewith by reason of the spring of the arms and the depressions 22 and 23 formed in the ends of the arms 18 and 19 respectively.

()ne end of the member extends into the path of operating projections 24 and 25 appropriately placed upon the rod 9 so that the reciprocation of the rod 9 causes the n'iember 20 to contact first with one spring arm and" then with the other and to thus change the How of current from one solenoid 15 to the other solenoid 16, as will be more fully explained hereinafter in describing Fig. 2. An insulating block 39 1S appropriately fastened to case 17 and bears upon its upper arcshaped surface the metallic shoe 40 which has a decided central depression at 41, in which the metallic wiper 42, attached to arm 5, rests when in mid position.

Fig. 2, shows schematically the circuit by which the electric motor composed of solenoids15 and 16, shown in Fig. 1, may be operated. As a means for closing the c1rcuit through the electric motor a two arm switch, of which one arm is designated by 38, and the other by 43, has been shown, which may be moved so as to connect wire 26 with wire 27, and wire 32 with wire 44. When wire 26 is connected to wire-27, and wire 32 is connected to wire 44, and the other parts are in the position as shown with member 20 making contact with spring arm 19, current will flow from the battery 28 in the following circuit: positive terminal of battery 28, wire 26, switch 38, wires 27, 35 and 36, solenoid 15, wire 37, spring arm 19,

member 20, wires 31 and 44, switch arm 43 ifisonee 5 at 3 to move to the left as viewed in Fig. 1.

50 battery 28.

The impulse given to the signal 1 by the energization of solenoid 15 will. cause signal 1 to generate a certain momentum so that if core 13 were rigidly connected through the chain of mechanism above described to the rod 2, when core 13 reached the end of its travel and abutted against the stop 33, a severe shock would be given all of the parts, as signal 1 would tend to continue to swing after the core 13 had completed its movement. To prevent the objectionable shock, so caused, applicant has provided a loose connection between rod 9 and stirrup 11, that is the rod 9 slides freely through the stirrup 11, but is caused to move downwardly when the stirrup 11 moves downwardly as viewed in Fig. 1 by reason of the enlarged head 34 thereon. This form of connection allows the core 13 to come to rest without causing the signal 1 at the same time to come to rest, bee: use due to the loose connection between rod 9 and stirrup 11 after the core 13 has come to rest, the signal 1 can continue swinging until its IIIOIIIGII;\

tum has been gradually overcome by gravity,

and to enable it to do this the stirrup 11 is made of such dimensions that the head 34 may have sutlicient room for movement in the stirrup to allow the signal 1 to be 'arrested in its upward swing, by gravity,-before head 34 contacts with the top of core 13.

The downward movement of rod 9 not only causes the signal 1 to move to the lett as viewed in Fig. 1, but also, by means of ro'ection 24 causes at the no or moment J 5 t L 7 the member 20 to more into contactwith the spring arm 29..

a circuit through the other solenoid 16 as wire 26, switch 38, wires 27, and 29, solenoid 16, wires Miami 30, spring arm 18, member 20 and wires 31 and 4:4, switch arm 43 and wire 32 to the other terminal of the The current flowing; in the above traced path causes the arm 10 to move downwardly and so causes, through the con necting' means 7, 5 and 4-, the movement of rod 2, bearing the signal 1. so that the signal 1. will be moved upwardly. to the ri g ht of its position, as shown in Fig. 1, that is, to the dotted line position as shown in Fig. 1.

The connection between rod 10 and core 14 is by means of a stirrup 1?, just as the 39 connection between rod 9 and core '13 is by means of a stirrup 11, and is for the same purpose and acts in exactly the same manner, that is, to prevent a severe shock being given to the mechanism by the stopping at 55 the same moment of both core 1 1 and the The movement of arm 20 into contact with spring arm 22 closes ,tact of projection 25 of rod 9 with member 20, so as to cause the movement of member 20 from contact with spring arm 18 into contact with spring arm 19, thus again closing the circuit through solenoid 15.

From the above description it will be seen that when the switch arms 38 and 43 arein the position shown in Fig. 2, the solenoids 15 and 16 are alternately energized, thus causing the lower end of rod 2 to'which is connected the signal 1 to move first to the left and then to the right of its position, as shown in Fig. 1, and also causing the member 20 to alternately engage spring arms 18 *and 19 so as to alternately close a circuit through solenoids 16 and 15, so that the mechanism remains in operation until the switch, composed of arms 38 and 48, is moved to the open position. The projections 24 and 25 are so placed upon the rod 9 that.

the current from the battery 28 is shifted from the circuit of one solenoid to that of the other at just about the moment when the signal 1 is at the extreme of its movement in each direction. If the switch arms 38 and 43 are moved from in contact with wires 27 and 41 respectively into contact with wires 43 and 47 then the signal 1 will be immediately stopped and brought to the mid po sition. This results because a circuit is 'formed as follows: battery 28, wire 26, arm 38, wires 47 and 37, solenoid 15, wires 38 and 2S), solenoidJG, wires 45 and -18, wiper 4-2. metallic are 40, wire 46, arm 43 and wire 32 to the other terminal of battery 98. Our" rent in theabove traced path energizes both solenoids.15 and 16 and through the cores 13 and 14 and the connecting mechanism cause theT crank to assume the mid-posi-- tion with the signal in mid-position. As scenes the T crank assumes the mid position, the circuit above traced which caused it to assume that position is broken as the wiper 42 is directly over the depression 11 in the metallic shoe 40 free from contact with the metallic shoe. This construction prevents current from constantly flowing even after the signal has been brought to rest.

Although 'I have particularly described the construction oi one physical embodiment of my invention, and ex ilaincd the operation and principle thereoi nevertheless, I desire to have it understood that the form selected is merely illustrative, but does not exhaust the possible physical embodiments p t-the idea of meansunderlying my in.ven-' ion.

What I claim as new and desire to secure by Letters Patent of the United States, is:

move independently of the said another core after the core has been completely drawn 7 into the solenoid; a link, one end of which is connected to the third arm of the T crank; a pendulum formed with a portion above its pivot connected to the other end of the link;

a source of current; and-means connecting the source of current and the solenoids including means operated by the rods for causing the solenoids to be alternately energized and 'so causing the pendulum to swing, said last named means acting to shift the flow of current at the moment when the pendulum has substantially completed its swing in one direction.

2. In an electric motor: a plurality of solenoids; a movable core in each solenoid;

two rods; a T crank; one rod connected to one arm of the T crank andto one of the cores so that the rod can move independently of the core after the core has been com pletely drawn into the solenoid, the other rod connected at one end to the opposite arm of the T crank and at the other end to 'another of the cores, so that the said other rod can move independently of the said another core after the core has been completely drawn into the solenoid; a link, one end of a which is connected to the thirdarm of the T crank; a pendulum formed with a portion above its pivot connected to the other end of the link; a source of current; means connecting the source of current and the solenoids including means operated by the rods for causing the solenoids to be alternately energized and so causing the pendulum to swing, said last named means acting to shift the flow of current at the moment when the pendulum has substantially completed its swing in one direction; and means including the means connectin the source of current and the solenoids and a contact closed at all portions of the arc of movement of the T crank, except the mid-position for bringing the pendulum to rest ininid-position,

STANLEY CHARLES BRYANT.

' Witnesses: I

R. W. CREMERIUS, A. F. KLINK. 

